227 results about "Life cycle costs" patented technology

A performance and cost analysis system and method comprises an output system; a calculation system operatively inputting data to the output system, wherein the calculation system is adapted to process system engineering and cost parameters of a system under analysis, make changes to the system engineering and cost parameters of the system under analysis, and calculate effects of factors influencing the system under analysis based on the changes made to the system engineering and cost parameters; an input model system operatively inputting data to the calculation system; and an input data system operatively inputting data to the calculation system and the output system, wherein the output system is adapted to identify changes to the system under analysis based on the calculated effects, and calculate a life cycle cost of the system under analysis based on the identified changes. Preferably, the system under analysis comprises hardware architecture components.

The invention provides an expansion planning comprehensive optimization method of a power distribution network with a distributed power supply. The expansion planning comprehensive optimization method includes the following steps that a multi-objective optimization function based on life-cycle cost is built; constraint conditions are determined; expansion planning comprehensive optimization of the power distribution network is performed. According to the expansion planning comprehensive optimization method of the power distribution network with the distributed power supply, the distributed power supply is taken as an optimizable factor, the minimum expansion grid cost serves as a target function, and the comprehensive optimization planning method of a substation, the distributed power supply and a feeder network under multiple constraint conditions is provided. Through solving, the optimal scheme of the position and the volume of a substation to be built in a planning area, the structure of the feeder network and the optimization configuration of the distributed power supply is obtained.

The invention discloses a detection method of road-surface evenness; in the measurement process, an accelerometer is utilized to detect relative displacement of a laser ranging device owning to road surface bumping, a three-dimensional gyroscope is utilized to detect the inclined angle of the laser ranging device owning to road surface bumping, and a three-dimensional synthesis attitude angle is synthesized under a two-directional coordinate system according to the attitude angles along the three directions; the relative displacement, the three-dimensional synthesis attitude angle and the distance measured by the laser ranging device are obtained, and vertical distance between the laser ranging device and the road surface is calculated; according to the detection density, all vertical distances are obtained, and a difference value with a standard reference distance is obtained, thereby obtaining a profile curve and the road-surface evenness. The method eliminates the problems that thealtitude of the laser ranging device is inclined owning to road surface bumping and data loses efficiency caused by position deviation, and solves the problem that the road-surface evenness can not bedetected under the low-speed (<25km/h) condition, thereby improving the detection efficiency, reducing the life cycle cost of highroads and improving the service life of the highroads.

The invention discloses an optimized planning method of an electric vehicle charging station based on whole life cycle cost, wherein the optimized planning method analyzes the cost benefit of a charging station and calculates the whole life cycle cost. The invention suggests estimation of a charging station capacity by means of road network traffic flow information. Maximization of net present value profit is used as an optimization target. The position and the capacity of the charging station are determined according to the road network traffic flow, electric network power quality and economic performance and user charging requirement as constraint conditions. Furthermore, the invention provides a charging station optimization planning model based on the whole life cycle cost, and furthermore the charging station optimization planning model is solved according to a quantum genetic algorithm. The optimized planning method can plan the electric vehicle charging station effectively and accurately, thereby obtaining an optimal station address and an optimal capacity, and calculating a maximal net present value. The optimized planning method compensates insufficiencies in present other electric vehicle charging station planning methods to a certain extent, and furthermore can obtain higher convergence speed and more accurate value in actual operation.

The invention discloses a capacity optimization configuration method for a hybrid energy storage system orientating optimization operation of a power distribution network. The capacity optimization configuration method comprises the steps of obtaining imbalance power between the optimal output and photovoltaic actual output when an optical storage system participates in operation of the power distribution network firstly, taking the imbalance power as a hybrid energy storage reference power, adopting ensemble empirical mode decomposition to decompose the imbalance power into a series of intrinsic mode functions, and performing recursion Hilbert conversion to obtain an instantaneous frequency-time curve of each intrinsic mode function separately; according to power type and energy type energy storage characteristics, determining crossover frequency by taking least aliasing of the instantaneous frequency-time curves as a principle, and stabilizing the high-frequency components and low-frequency components of the imbalance power by adopting power type energy storage and energy type energy storage respectively; and finally, by considering charging-discharging efficiency, state of charge and life cycle cost, a power type and energy type energy storage rate power and rate capacity economic optimal configuration scheme is proposed. Compared with a conventional method, new energy output can be compensated, consumption capability to new energy can be improved, and active participation to the optimization operation of the power distribution network can be realized.

A power plant control system determines an augmented operating parameter set point responsive to a life cycle cost (LCC) objective function responsive to a LCC model. The augmented operating parameter value may be responsive to an initial set point determined by a controls model and a performance indicator determined by a performance model. The power plant may include a thermal generator, such as a gas turbine or other fuel-burning generator, and the operating parameter may include firing temperature, fuel flow rate, steam pressure/temperature/flow rate, and/or another suitable operating parameter. An offer curve is generated responsive to the augmented operating parameter.

The invention discloses a parameter matching joint optimization method of a fuel cell hybrid tramcar. The method includes: according to operation needs and target route conditions, designing tramcar power system indexes and tramcar operation conditions and determining the parameter feasible region of a fuel cell hybrid power system to form a preliminary parameter matching alternative scheme; usingwhole life cycle cost, service time and the power performance of the whole tramcar as the optimization targets to build a multi-target optimization function, using the self-adaptation swarm intelligent optimization algorithm based on probability indexes to complete load allocation under optional parameter combination, and using the load allocation when the value of the multi-target optimization function is minimum as the optimal allocation result under the parameter matching combination; traversing all alternative parameter combinations, and searching for the global optimum on the basis of the individual optimum to complete the optimal parameter matching optimization calculation of the fuel cell hybrid tramcar. By the method, hydrogen consumption can be reduced effectively, the efficiencyof the whole tramcar can be increased, and optimal economical efficiency during operation can be achieved.

The invention discloses a distribution network planning scheme evaluation data processing system which comprises an economic index processing module based on whole life cycle cost, a reliability index processing module based on a minimal path method, and a flexibility index processing module based on maximum power supply capability. The economic index processing module based on the whole life cycle cost is used for taking the investment cost, operation and maintenance cost, life period and the like as input data, calculating and processing the data and outputting the whole life cycle cost and traditional financial evaluation indexes; the reliability index processing module is used for taking the planning scheme structure, equipment parameters and the like as input data, outputting the system average interruption frequency and other indexes of load nodes and the equivalent mean interruption duration on the system side and the other indexes; and the flexibility index processing module based on the maximum power supply capability is used for outputting the maximum power supply capability, the network transfer capability and the other indexes. Finally, comprehensive evaluation of multiple indexes is realized by adopting a fuzzy mathematics comprehensive evaluation module. Compared with the prior art, the distribution network planning scheme evaluation data processing system disclosed by the invention has the advantages of comprehensiveness and practicality.

The invention relates to a power grid economy evaluation data processing system based on life cycle cost. The system comprises an improved financial evaluation index processing module, an effect index processing module based on the life cycle cost and a lowest on-grid price index processing module. After calculating and processing input data including life cycle cost data, newly increased cash inflow data and newly increased cash outflow data within a research period, the improved financial evaluation index processing module outputs financial net present value data, financial internal-rate-of-return data and investment payback period data. After calculating and processing the input data, namely the life cycle cost data, within the research period, the effect index processing module based on the life cycle cost outputs direct economic benefit effect index data and indirect economic benefit effect index data. The lowest on-grid price index processing module is used for calculating the lowest on-grid price data. Compared with the prior art, the power grid economy evaluation data processing system based on the life cycle cost has the advantages of objectivity, comprehensiveness, accuracy in evaluation and the like.

The invention discloses a high-frequency high-voltage transformer design optimization method based on a genetic algorithm. On the basis of a minimum loss formula of a transformer and the insulation dimension and the iron core shape of the transformer, a mathematical model is established, a genetic algorithm is adopted for optimizing the transformer by taking the number of turns of primary sides and the layer number of secondary sides as optimization variables and taking efficiency as an optimization target, so that the efficiency of the transformer is maximized, the loss of the transformer is minimized, temperature rise is minimized under an equal condition, the leakage inductance and the distribution capacitance of the transformer are fully utilized to participate in the work of a power system to form an LCC (Life Cycle Costs) resonance circuit, and the loss of the transformer is reduced so as to lower the temperature rise. Compared with the prior art, the invention introduces the genetic algorithm, the genetic algorithm exhibits a problem non-relevant quick and random search capability, searches by starting from a group and has the characteristic of concurrency, and a plurality of individuals can be simultaneously compared to greatly quicken optimal solution search speed.

The invention discloses a power distribution line tower span panning method based on load reliability. The randomness of the maximum wind velocities of typhoons and the frequency of typhoon landing are taken into account; an overhead power distribution line load reliability calculation model is built based on the type I distribution of the maximum wind velocity values of typhoons; with the whole life cycle cost of a power distribution system as a target function and a pole model number and a span length as decision variables, an overhead power distribution line tower and span planning model is built. The power distribution line tower span panning method based on the load reliability is characterized in that the tower and span planning model with the whole life cycle cost of the power distribution system as the target function and the line span as a constraint condition is built by taking the power interruption cost due to line pole collapse and breakage faults into account in combination with a tower investment cost and a maintenance cost. Based on the planning method, the planning personnel can control the load risk level of an overhead power distribution line visually, and the optimal scheme considering both economic efficiency and reliability can be obtained.

The invention discloses a method for selecting a neutral point grounding mode of a medium voltage distribution network. According to the method, according to the difference of the influences of different neutral point grounding modes on the medium voltage distribution network, the reliability of the power distribution network under the different neutral point grounding modes is evaluated and compared through quantitative calculation of the line fault trip probability of the power distribution network, reliability evaluation and operating cost analysis of the power distribution network under the different neutral point grounding modes are combined, so that the optimal neutral point grounding mode of the power distribution network is selected by the way of calculating the whole life cycle cost of the power distribution network under the different neutral point grounding modes and reliability factors in a combined mode, the design and transformation engineering requirement of the medium voltage distribution network can be met, and the security and the operating maintenance efficiency of the power distribution network are improved. By the adoption of the method, the high reliability neutral point grounding mode with optimal economy can be decided on the basis that the influence of the different neutral point grounding modes on the reliability and the construction operating cost of the medium voltage distribution network is calculated.

An apparatus and method to reduce the life cycle cost associated with aircraft signs. The apparatus includes a display attached to the aircraft. The apparatus also includes a memory coupled to the display which stores a plurality of pieces of information and a circuit coupled to the memory. The circuit causes at least one of the pieces of information to appear on the display, whereby the circuit may change the information displayed on the display. Moreover, the information may include a plurality of aircraft sign images and the apparatus may include a data port for changing the displayed information and for modifying the stored information. Additionally, the data port may be for either wireless or a hard wired connection. Also, the display may be an organic electroluminescent device.

The invention is directed generally to improvements in irrigation and fertilization assessment and delivery. More specifically, embodiments of the invention provide an improved fluid delivery tube, method to manufacture such tube, and systems that include such tube. The delivery tube is beneficial at least because it minimizes the life cycle cost of a responsive delivery tube.

A refrigerant cycle includes economized tandem compressors. The refrigerant cycle is also provided with a common economizer circuit for all tandem compressors. Common manifolds communicate discharge, suction and economizer return flows within the refrigerant cycle to each of the tandem compressors. Also, an optional unloader function is provided for each of the compressors. Various arrangements allow enhanced operation control, improved system reliability and reduced equipment life-cycle cost.

A refrigerant system incorporates at least two compressors that act in tandem to provide variable control over the refrigerant system performance. The tandem compressors can be of conventional or economized type and are configured for maximum performance utilization. Further, a reheat circuit can be incorporated into the refrigerant system at several different locations. The reheat cycle provides additional control over sensible and latent capacity of the refrigerant system, and is particularly advantageous when utilized in combination with the tandem compressors. As a result, multiple steps of unloading can be implemented in all operation regimes, the external load demands are satisfied with much greater precision, eliminating undesirable variations in temperature and humidity, system efficiency and reliability are augmented and equipment life-cycle cost is reduced.

The invention discloses a method for evaluating the economic operation year range of a transformer substation. According to an original fault rate model based on Weibull distribution or index distribution, only the service age is taken as the variable, various other factors influencing the fault rate of the transformer substation are not considered, and thus the original fault rate model is not suitable for being taken as a model for predicting the fault rate of the transformer substation. According to the method for evaluating the economic operation year range of the transformer substation, the transformer substation is evaluated comprehensively in the aspects of the operating environment and the quality condition, the influence of the two factors on the defect-level fault rate, the invalid-level fault rate and the accident-level fault rate of the transformer substation is analyzed by means of a least square support vector machine under the condition that the different operating times of the transformer substation are considered, the annual maintenance cost range and the fault cost range of the transformer substation under the conditions of the three types of fault rates are obtained by combining the interval analysis method and the whole life cycle cost theory, and finally the operating year range in which the annual average cost of the transformer substation is lowest is taken as the economic operation year range of the transformer substation. The method can provide beneficial guidance for decisions such as power grid planning and transformer substation transformation.

The invention discloses a method for evaluating economy of for differential planning of an electric system. Based on principles and requirements on differential planning of a large power grid, a life cycle cost theory is combined with a 'with and without comparison' theory in disaster economics, a set of differential life cycle cost-effectiveness economy evaluation system is provided; increased cost, reduced benefit, disaster happening time and probability are comprehensively considered, three economy evaluation indexes about accumulated increased cost, expected net benefit and benefit cost are provided; difference between service lives and operation time of different equipment is comprehensively considered, and via determining a unified time period, economy evaluation from equipment level (unit piece) to a system level (multiunit pieces) for the differential planning is realized. The method for evaluating the economy of for the differential planning of the electric system has important instructing significance for selection of reinforcing equipment, determination of design standards and comparison and selection of an optimum differential planning scheme in the differential planning of the power grid.

The invention discloses a distribution network energy storage optimization configuration method considering whole life cycle cost. A two-stage optimization solution method is adopted to solve the problems of distribution network energy storage addressing and constant volume; from the aspects of energy storage to stabilize voltage fluctuations caused by distributed power and load, with the whole life cycle cost of energy storage as an optimization goal, a two-stage optimization model is established; in a first stage, candidate nodes are screened through a genetic algorithm and a simulated annealing algorithm, and energy storage required mounting nodes and the energy storage operation strategy and the minimum mounting capacity of each node are outputted finally; and in a second stage, the service life of the energy storage is considered based on the optimization result in the first stage, and the energy storage capacity configuration with the lowest whole life cycle cost is optimized through the genetic algorithm and the simulated annealing algorithm. The method considers the random output fluctuation of the distributed power and the whole life cycle cost of the energy storage system, and can obtain a more economical energy storage location and a capacity allocation scheme for the distribution network, and a reference is provided for the distribution network energy storage optimization configuration method.

The invention discloses a distribution line type selection method based on lowest composite cost. The distribution line type selection method includes steps: (1) giving load a peak value Pmax; (2) determining the voltage grade U according to power distribution network correlation techniques; (3) selecting a line series of the voltage grade according to the guide rule of the power distribution network correlation techniques, namely S1, S2...Sn; (4) calculating cost of the selected line series, namely CS1, CS2...CS3, one by one; (5) selecting a line type with the lowest composite cost; and (6) performing allowable voltage loss verification for the selected line and leading the line to be the optimum if the selected line meets requirements. The distribution line type selection method comprehensively considers investment cost, operation maintenance cost, electric energy loss cost, outage loss cost, retired disposal cost and environmental cost of line devices, solves problem that the existing line type selection method cannot reflect whole life cycle cost of the line devices, customer cost and environmental cost, and can achieve lowest whole society composite cost in the line life cycle.

The present invention discloses a hybrid energy storage capacity optimization configuration method in grid connected wind-solar generation. The energy management strategy is determined that storage battery work state optimization is taken as a principle and improving the system integration economical efficiency is taken as a target, based on the energy management strategy, the calculating flow of the energy loss rate and the energy deletion rate of the grid connected wind-solar generation system is analyzed, according to a total life-cycle cost theory, an annual average cost function expression of the energy storage device is built, and an energy storage capacity optimization configuration model taking the minimum function value as the target and taking the operation indexes such as the energy loss rate and the energy deletion as a constraint is built, and finally the optimization configuration model is solved by employing an improved chaotic optimization algorithm. The improved chaotic optimization algorithm employs the chaotic motion with ergodicity, randomness and regularity so as to effectively complete the calculation of the complex non-linear optimization configuration model.